b'Geophysics in the surveysNewsGeological Survey of South Australia: SAEMC 2020, AusArray SA, Central Delamerian Broadband MT transectSAEMC 2020 cancelled Conference registration fees are kept lowstrength has always been the networking to encourage a broad attendance and theopportunities the event provides, and The South Australian Exploration andmodest surplus is invested in student- the ability for all attendees to see and Mining Conference (SAEMC) has beenrelated activities by the local professionalhear what is going on in the SA mining held annually near the end of the yearassociations. and exploration space, something since 2004. It is preferably held on Saintthat cannot be achieved as effectively Barbaras DaySt Barbara being theUnfortunately, a COVID-19 outbreakthrough an online-only platform. The patron saint of minerson the first Fridayon November 16 sent Adelaide intoevent was, therefore, cancelled for 2020, in December. This year it was scheduledlockdown. The committee explored theand the committee is organising refunds for November 27. possibility of holding a purely digitalfor all delegates, sponsors and exhibitors.conference, but concluded that this The conference is designed to provide anwas untenable in the short time-frameThank you everyone for your support and opportunity for active South Australianavailable, specifically taking into accountunderstanding, and we look forward to mineral explorers and miners to presentour sponsors and exhibitors, who wouldseeing you at SAEMC 2021!succinct technical updates to their peersnot get the same value for money fromPhilip Heath of activities on their flagship minesa purely online event. SAEMCs keyPhilip.Heath@sa.gov.auand exploration projects. Participants gain a comprehensive appreciation of the diverse activities in South Australia and gain ideas from each other, which collectively improves our chances of mineral discovery and improved mining developments.The conference is organised by a voluntary committee representing four local branches of professional associations:Australian Institute of Geoscientists (AIG)Australian Society of Exploration Geophysicists (ASEG)Australasian Institute of Mining and Metallurgy (AusIMM)Geological Society of Australia (GSA)Representatives from the South Australian Department for Energy and Mining (DEM) and University of Adelaide have also joined the committee. Department for Energy and Mines Executive Director for Minerals Alex Blood presents SAEMC 2019AusArray SA passive seismic arrayIt has been established that theexhibit a readily discernible signature,In conjunction with partners at locations of giant magmatic- andfacilitating their delineation in 3D.ANU (lead by Dr Caroline Eakin), the sediment-hosted ore deposits show aThis geophysical delineation iscomposite AusArray SA and Lake Eyre correlation with craton margins (e.g.especially pertinent in places likeBasin arrays will shed light on the 3D Griffin et al 2013, Hoggard et al 2020).South Australia where extensive coverseismic structure of the eastern Gawler Thus, although the specific geologicallargely precludes direct geologicalCraton and its margins. Data from the ingredients and processes responsiblesampling. Motivated by this, thepermanent stations of the Australian for ore generation remain enigmatic,GSSA deployed the AusArray SANational Seismic Network and Australian favourable regions for exploration canbroadband seismic array across theSeismometers in Schools program, and nevertheless be identified via the cratoneastern-central Gawler Craton overfrom preceding temporary arrays, will margin proxy. two weeks in October 2020 (Figures 1also be leveraged (Figure 1). A host of and 2). The 38-station array is designedpassive seismic modelling techniques From a seismic perspective, the thick,to acquire seismic data at the samewill be applied to map the 3D-structure cold and geochemically-depletedstation spacing (~0.5) as the AusLAMPof the eastern Gawler Craton from lithospheric mantle keels of cratonsmagnetotelluric (MT) array. the upper crust to the lithosphere-19 PREVIEW DECEMBER 2020'